Science / Geology / Differentiated Planet: A planet that has layers composed of elements and minerals of different densities. As an example, Earth is a differentiated planet because it has a metal-rich core, surrounded by a rocky mantle, and covered by a crust of low-density minerals.
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Science / Astrology / Planetary Node: The point at which a planet's path intersects the ecliptic; declination, 0°. The term is usually reserved for nodes other than the Moon's Nodes. MORE
Science / Astrology / Planetary Hours: A system devised by ancient astrologers that assigned one of the seven planets then known to each hour of the day. The first hour of sunrise was ruled by the planetary day ruler (Sunday, Sun; Monday, MORE
Technology / Motorcycle / Planetary Gear: A gear system that consists of one or more outer gears (or planet gears), rotating about a central gear (or sun gear). Planet gears are often mounted on a movable arm or carrier which also may rotate MORE
Science / Astrology / Planet: From the Greek planetes, wanderer; used astrologically to describe any heavenly body which when viewed from Earth appears to move, as distinguished from fixed stars. MORE
Science / Astrology / Planetary Patterns: Used interchangeably with shaping. Sometimes equated with aspect patterns. See also shaping, Bowl, Bucket, Bundle, Locomotive, See-Saw, Splash, Splay. MORE